苄氧基甲基-11-冠-3钠离子选择性电极的研制及应用

Preparation of Benzyloxymethyl-11-Crown-3-Sodium Ion Selective Electrode

合成了苄氧基甲基－１１－冠－３，并以此作载体制成了ＰＶＣ膜离子选择性电极。研制的 电极对钠离子响应的线性范围为１．０×１０－１～４３×１０－５ｍｏｌ／Ｌ；检测下限为２．１×１０－５ mol/L；斜率为５７．４±０．２ ｍＶ／ＰＣ（２５℃）．电极具有良好的稳定性和重现性。此电极用于钠离 子测定，结果与火焰光度法一致。

This paper describes the preparation of sodium ion selective electrode based on benzyloxymethyl-11-crown-3 synthesized in our laboratory. The electrode exhibits Nernst response for sodium with a slope of 57.4± 0. 2 mV/PC(25℃) over the concentration range of 1.0X10-1~4. 3 X 10-5 mol/L. The detection limit is 2.1 X 105 mol/L. The electrode has the advantages of good stability and reproducibility. The electrode has been applied to the detemination of sodium ion in artificial samples with satisfactory results.